[PATCH V3 01/16] PCI: Add #defines for some of PCIe spec r4.0 features

[Vidya Sagar]

Add #defines only for the Data Link Feature and Physical Layer 16.0 GT/s
features.

Signed-off-by: Vidya Sagar <vidyas@xxxxxxxxxx>
Reviewed-by: Thierry Reding <treding@xxxxxxxxxx>
---
Changes from [v2]:
* Updated commit message and description to explicitly mention that defines are
  added only for some of the features and not all.

Changes from [v1]:
* None

 include/uapi/linux/pci_regs.h | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h
index 5c98133f2c94..3e01b55d548d 100644
--- a/include/uapi/linux/pci_regs.h
+++ b/include/uapi/linux/pci_regs.h
@@ -705,7 +705,9 @@
 #define PCI_EXT_CAP_ID_DPC	0x1D	/* Downstream Port Containment */
 #define PCI_EXT_CAP_ID_L1SS	0x1E	/* L1 PM Substates */
 #define PCI_EXT_CAP_ID_PTM	0x1F	/* Precision Time Measurement */
-#define PCI_EXT_CAP_ID_MAX	PCI_EXT_CAP_ID_PTM
+#define PCI_EXT_CAP_ID_DLF	0x25	/* Data Link Feature */
+#define PCI_EXT_CAP_ID_PL	0x26	/* Physical Layer 16.0 GT/s */
+#define PCI_EXT_CAP_ID_MAX	PCI_EXT_CAP_ID_PL
 
 #define PCI_EXT_CAP_DSN_SIZEOF	12
 #define PCI_EXT_CAP_MCAST_ENDPOINT_SIZEOF 40
@@ -1045,4 +1047,22 @@
 #define  PCI_L1SS_CTL1_LTR_L12_TH_SCALE	0xe0000000  /* LTR_L1.2_THRESHOLD_Scale */
 #define PCI_L1SS_CTL2		0x0c	/* Control 2 Register */
 
+/* Data Link Feature */
+#define PCI_DLF_CAP		0x04	/* Capabilities Register */
+#define  PCI_DLF_LOCAL_DLF_SUP_MASK	0x007fffff  /* Local Data Link Feature Supported */
+#define  PCI_DLF_EXCHANGE_ENABLE	0x80000000  /* Data Link Feature Exchange Enable */
+#define PCI_DLF_STS		0x08	/* Status Register */
+#define  PCI_DLF_REMOTE_DLF_SUP_MASK	0x007fffff  /* Remote Data Link Feature Supported */
+#define  PCI_DLF_REMOTE_DLF_SUP_VALID	0x80000000  /* Remote Data Link Feature Support Valid */
+
+/* Physical Layer 16.0 GT/s */
+#define PCI_PL_16GT_CAP		0x04	/* Capabilities Register */
+#define PCI_PL_16GT_CTRL	0x08	/* Control Register */
+#define PCI_PL_16GT_STS		0x0c	/* Status Register */
+#define PCI_PL_16GT_LDPM_STS	0x10	/* Local Data Parity Mismatch Status Register */
+#define PCI_PL_16GT_FRDPM_STS	0x14	/* First Retimer Data Parity Mismatch Status Register */
+#define PCI_PL_16GT_SRDPM_STS	0x18	/* Second Retimer Data Parity Mismatch Status Register */
+#define PCI_PL_16GT_RSVD	0x1C	/* Reserved */
+#define PCI_PL_16GT_LE_CTRL	0x20	/* Lane Equalization Control Register */
+
 #endif /* LINUX_PCI_REGS_H */
-- 
2.17.1